Synthesis, characterization, and ethylene polymerization of 1-[2,4-bis(bis(4-fluorophenyl)methyl)naphthylimino]-2-aryliminoacenaphthylnickel bromides: influences of polymerization parameters on polyethylenes

• Published in: RSC advances Vol. 6; no. 9; pp. 7431 - 7438
• Main Authors: Yuan, Shifang, Yue, Erlin, Wen, Chunyan, Sun, Wen-Hua
• Format: Journal Article
• Language: English
• Published: 2016
• ISSN: 2046-2069; 2046-2069
• DOI: 10.1039/C5RA23644D

A series of 1-[2,4-bis(bis(4-fluorophenyl)methyl)naphthylimino]-2-aryliminoacenaphthylene derivatives ( L1–L5 ) was prepared and used to react with (DME)NiBr 2 to form the title complexes ( C1–C5 ). The organic compounds were characterized by 1 H/ 13 C NMR measurements, FT-IR spectra and elemental analysis. Meanwhile, the nickel complexes were analyzed by FT-IR spectra, elemental analysis, and single-crystal X-ray diffraction of the representative complex C1 , which indicated a distorted tetrahedral geometry around the nickel center. Upon activation with diethylaluminum chloride (Et 2 AlCl), all the title nickel complexes were highly active for ethylene polymerization, resulting in polyethylenes with high molecular weights ranging from 0.86–5.58 × 10 5 g mol −1 and narrow polydispersity (1.22–1.99). Moreover, significant influences of polymerization parameters on the resultant polyethylenes were examined and are discussed.